Component Location
General Description
Driver’s intension to accelerate is transmitted to ECM through Accelerator Pedal Sensor(APS) . And APS, whose mechanism is same as TPS, is required for ECM to determine optimum fuel injection quantity.
As fidelity of APS is strongly required, APS is devided into two. One is APS1, which outputs main signals and the other is APS2, which monitors APS1 performance.
APS1 and 2 do not share power supply and ground. Normally, APS2 output voltage is the half of APS1 and if the ratio of two signal is out of specified value, error is recognized then, Limp Home mode is activated.
When Limp Home mode is activated, engine speed is fixed at 1000RPM and driving performance is limited to prevent excessive power generation due to APS false signal.
DTC Description
The TCM sets this code if an expected low rpm detected.
DTC Detecting Condition
Item | Detecting Condition | Possible Cause |
DTC Strategy | | ? Faulty in APS ? Faulty in APS circuit ? Faulty in TCM/ECM |
Enable Conditions | ? Always |
Threshold Value | ? Lower value than specification |
Diagnostic Time | ? More than 2sec |
Fail Safe | ? Fail detecting for "INPUT SPEED SENSOR,SOLENOID VALVE" are inhibited. ? Slope control and coast control are inhibited. |
Specification
| Pedal Released | Pedal Depressed | Sensor Type |
APS 1 | 0.7V~0.8V | 3.8V~4.4V | Variable resistance type(Potentiometer) |
APS 2 | 0.275V~0.475V | 1.75V~2.35V |
Schematic Diagram
Signal Waveform